Accéder au contenu
Merck
Toutes les photos(4)

Principaux documents

Voir toute la documentation

M0375

Sigma-Aldrich

Acide maléique

ReagentPlus®, ≥99% (HPLC)

Synonyme(s) :

Acide cis-butanedioïque, Acide toxylique

Se connecterpour consulter vos tarifs contractuels et ceux de votre entreprise/organisme
Toutes les photos(4)

About This Item

Formule linéaire :
HO2CCH=CHCO2H
Numéro CAS:
110-16-7
Poids moléculaire :
116.07
Beilstein:
605762
Numéro CE :
203-742-5
Numéro MDL:
MFCD00063177
Code UNSPSC :
12352100
ID de substance PubChem :
24896549
Nomenclature NACRES :
NA.21
Le tarif et la disponibilité ne sont pas disponibles actuellement.

Qualité

reagent grade

Niveau de qualité

200

Densité de vapeur

4.0 (at °C, vs air)

Pression de vapeur

≤0.1 at hPa ( 20 °C)

Gamme de produits

ReagentPlus®

Essai

≥99% (HPLC)

Forme

powder

Concentration

≤100%

Impuretés

≤2.0% water

Résidus de calcination

≤0.1%

pH

1,3 -at 100 g/l (at 20 °C)

pKa (25 °C)

(1) 1.97, (2) 6.24

pb

157.8 °C/316.0 °F -at 997 hPa

Pf

130-135 °C (lit.)

Solubilité

water: soluble 478,8  g/L at at 20 °C (Completely )

Densité

1.59 g/mL at 25 °C (lit.)

Groupe fonctionnel

carboxylic acid

Chaîne SMILES 

OC(=O)\C=C/C(O)=O

InChI

1S/C4H4O4/c5-3(6)1-2-4(7)8/h1-2H,(H,5,6)(H,7,8)/b2-1-

Clé InChI

VZCYOOQTPOCHFL-UPHRSURJSA-N

Vous recherchez des produits similaires ? Visite Guide de comparaison des produits

Description générale

Maleic acid (MA) is a dicarboxylic acid that undergoes esterification with ethanol in the presence of cation-exchange resin catalysts to form diethyl maleate.[1] Its crystalline structure has been analyzed.[2] Reaction kinetics and mechanism of the isomerization of maleic acid to fumaric acid in the presence of ceric and bromide ions has been investigated.[3] The reaction mechanism and reactivity ratios for the radical copolymerization of maleic acid with styrene have been determined.[4]

Application

Maleic acid has been used in the preparation of tris-maleate buffer[5] and sodium maleate buffer.[6][7] It has also been used for the pretreatment of poplar tracheid cell walls for the spectroscopic analysis of lignin.[8] It may be used to synthesize superswelling acrylamide/maleic acid hydrogels.[9]

Qualité

Repurified

Informations légales

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

Pictogrammes

CorrosionExclamation mark
GHS05,GHS07

Mention d'avertissement

Danger

Mentions de danger

H302 + H312,H314,H317,H335

Classification des risques

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1 - Skin Corr. 1 - Skin Sens. 1 - STOT SE 3

Organes cibles

Respiratory system

Code de la classe de stockage

8A - Combustible corrosive hazardous materials

Classe de danger pour l'eau (WGK)

WGK 1

Faites votre choix parmi les versions les plus récentes :

Certificats d'analyse (COA)

Lot/Batch Number
WXBF5042V
0000406265
0000404822
0000400635
0000404822

Vous ne trouvez pas la bonne version ?

Si vous avez besoin d'une version particulière, vous pouvez rechercher un certificat spécifique par le numéro de lot.

Rechercher un(e) COA

Déjà en possession de ce produit ?

Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.

Consulter la Bibliothèque de documents

Les clients ont également consulté

Slide 1 of 2

1 of 2

Réactif de blocage For nucleic acid hybridization and detection

Roche

11096176001

Réactif de blocage

Maleic acid disodium salt hydrate ≥98%

Sigma-Aldrich

M9009

Maleic acid disodium salt hydrate

Esterification of maleic acid with ethanol over cation-exchange resin catalysts.
Yadav GD and Thathagar MB.
Reactive functional Polymers, 52(2), 99-110 (2002)
Swelling equilibria and dye adsorption studies of chemically crosslinked superabsorbent acrylamide/maleic acid hydrogels.
Karadag E, et al.
Eur. Polymer J., 38(11), 2133-2141 (2002)
Determination of total dietary fibre and available carbohydrates: A rapid integrated procedure that simulates in vivo digestion.
McCleary BV, et al.
Starch, 67(9-10), 860-883 (2015)
Bromine-Catalyzed Isomerization of Maleic Acid to Fumaric Acid.
Jwo JJ.
J. Chin. Chem. Soc., 28(1), 34-41 (1981)
A refinement of the crystal structure of maleic acid.
James MNG and Williams GJB.
Acta Crystallographica Section B, Structural Science, 30(5), 1249-1257 (1974)
Afficher tous les articles scientifiques apparentés

Articles

Acid and Base Chart — Table of Acids & Bases

Acid and base chart lists the strength of acids and bases (strongest to weakest) in order. Simple to use laboratory reference chart for scientists, researchers and lab technicians.

Acid and Base Chart — Table of Acids & Bases

Acid and base chart lists the strength of acids and bases (strongest to weakest) in order. Simple to use laboratory reference chart for scientists, researchers and lab technicians.

Acid and Base Chart — Table of Acids & Bases

Acid and base chart lists the strength of acids and bases (strongest to weakest) in order. Simple to use laboratory reference chart for scientists, researchers and lab technicians.

Acid and Base Chart — Table of Acids & Bases

Acid and base chart lists the strength of acids and bases (strongest to weakest) in order. Simple to use laboratory reference chart for scientists, researchers and lab technicians.

Questions

1–2 of 2 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

Reviews

No rating value

Active Filters

Notre équipe de scientifiques dispose d'une expérience dans tous les secteurs de la recherche, notamment en sciences de la vie, science des matériaux, synthèse chimique, chromatographie, analyse et dans de nombreux autres domaines..

Contacter notre Service technique